Pentafluorodimethylheptanedione(pfdmhd)
[化] 五氟二甲基庚二酮
??? 情景例句
and come back Sunday.
然后在星期天回來。
Curzon Street? Isn't Mary living there?
可勝街？瑪麗不是也住那兒嗎？
What else is there to do?
還有什么事好干？